Salary Info for a Construction Worker. According to the U.S. Bureau of Labor Statistics (BLS), the average hourly wage of a construction worker was $16.84 in 2013 (www.bls.gov).Typically, construction workers who are employed by nonresidential building companies earn a higher salary than workers on residential building and utility systems projects.he BLS predicted a 25% job growth for construction careers from 2012-2022. With population increases and the need for improvement of roads, buildings and bridges, construction workers who are willing to relocate and have specialized training may have the best job opportunities.
@Huck Smith ...err then that is not a histogram. A histogram is a crude estimate of the probability density function of a univariate (in the conventional sense of a histogram) variable. Hence, in a histogram the x-axis represents the single variable and the y-axis is the estimate of the density of the data at values on the scale of x. The information about plot(), write(), and read.csv() were very useful to me. The terminology related to plot and histogram is something I can use.
The histogram, dot plot and box plot in each separate section represent the same data set. Symmetric (bell shaped) - when graphed, a vertical line drawn at the center will form mirror images, with the left half of the graph being the mirror image of the right half of the graph. In the histogram and dot plot, this shape is referred to as being a bell shape or a  mound . The most typical symmetric histogram or dot plot has the highest vertical column in the center. This shape is often referred to as being a normal curve  (or normal distribution).